`TCustomFirstOrderFilter`

`TCustomIIRFilter`

`TCustomGainFrequencyFilter`
pt	ro	GainFactor
pt	ro	ExpW0
pt	ro	W0
		Gain
		Frequency

`TCustomFilterWithOrder`
		Order

`TCustomFilter`
pt	ro	SampleRateReciprocal

`TDspSampleRatePersistent`
		SampleRate

`TDspPersistent`

`TNotifiablePersistent`
pt	ro	UpdateCount